2. A TV set, a stove, a flat iron are connected in series to a 220 V line. The resistance of the TV set is 20 ohms, the stove is 50 ohms and the flat iron is 35 ohms. Find the following;
(a) total resistance
(b) the amount of current flowing in each device
(c) the voltage drop across each device
(a) total resistance
"R=R_1+R_2+R_3\\\\\n=20+50+35=105\\:\\Omega"(b) the amount of current flowing in each device
"I_1=I_2=I_3=\\frac{V}{R}\\\\\n=220\/105=2.1\\:\\rm A"(c) the voltage drop across each device
"V_1=I_1R_1=2.1*20={42\\:\\rm V}\\\\\nV_2=I_2R_2=2.1*50={105\\:\\rm V}\\\\\nV_3=I_3R_3=2.1*35={73\\:\\rm V}"
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